@Chas that
Parts of trailer hitch is a quality link. It shows the official name of each part, and eludes to the colingual usage of the names of the parts.
on the plus side this conversation has identified the Mazda OEM part number for the ball mount
Trailer Hitch, Ball Mount | 0000-8E-R08 |
which I am guessing does NOT include the ball, 2" or otherwise.
I would agree the ball mount is not included in the price of the receiver, but the OP should speak to a couple of dealers because it is so freaking hard to get to an online parts catalog. I am spoiled by the multitude of Honda/Acura on line parts catalogs...
And of course, neither is the wiring harness.
It is just me, but I would consider a non-OEM Class 3, 2-inch trailer receiver, rather than the OEM 1.25 inch receiver. For me, not that I tow, but when we did a lot of bike riding, the 2 inch bike carrier tube seemed to be standard. It was really sort of hard to get a 1.25 inch bike carrier for four bikes, and the accessory converters 1.25 to 2 inch can be loose fitting, putting a lot more play into the assembly, as well as moving the whole carrier further away from the car center of gravity.